Postman work correctly but Android app don’t receive notification

Question

I want to send push notification to Android app from Postman. My settings are:

Sending notification works right and Postman shows me “{"message_id":6108453121985358090}” (example). However, Android app doesn’t receive the push notification. In the meantime, if I send notifications from the Firebase console everything will work fine.

My code from FirebaseMessagingService:

class MyFirebaseMessagingService : FirebaseMessagingService() {

private val CURRENT_PUSH = "currentPush"
private var sPref: SharedPreferences? = null
//var preferences: SharedPreferences? = null

override fun onMessageReceived(remoteMessage: RemoteMessage?) {
    super.onMessageReceived(remoteMessage)

    if(loadCurrentPushNotification()) {

        if (remoteMessage!!.data != null)
            sendNotification(remoteMessage)
    }
}

private fun sendNotification(remoteMessage: RemoteMessage) {
    val data = remoteMessage.data

    val title = data["title"]
    val content = data["content"]

    val notificationManager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
    val NOTIFICATION_CHANNEL_ID = "1234"

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        @SuppressLint("WrongConstant") val notificationChannel = NotificationChannel(NOTIFICATION_CHANNEL_ID,
                "SA Notification",
                NotificationManager.IMPORTANCE_MAX)

        notificationChannel.description = "SA channel notification"
        notificationChannel.enableLights(true)
        notificationChannel.lightColor = Color.RED
        notificationChannel.vibrationPattern = longArrayOf(0, 1000, 500, 1000)
        notificationChannel.enableVibration(true)

        notificationManager.createNotificationChannel(notificationChannel)
    }


    val notificationBuilder = NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID)

    notificationBuilder.setAutoCancel(true)
            .setDefaults(Notification.DEFAULT_ALL)
            .setWhen(System.currentTimeMillis())
            .setSmallIcon(R.drawable.sa_launcher)
            .setContentTitle(title)
            .setContentText(content)
            .setContentInfo("Breaking")

    notificationManager.notify(1, notificationBuilder.build())
}

override fun onNewToken(s: String?) {
    Log.i(C.T, "NEW_TOKEN" + s!!)
}

private fun loadCurrentPushNotification(): Boolean { //to read the status push notification from SharedPreferences
    sPref = getSharedPreferences("pushesOnOff", Context.MODE_PRIVATE)
    return sPref!!.getBoolean(CURRENT_PUSH, true)
}

}

Where did I make a mistake?

Answer 1

Have you tried to use a specific device's token id in your "to" field? You can also try to move the data payload to under the data tag (try with and without the "notification" part), i.e.:

"notification" : {
     "body" : "Generic message body",
     "title": "Generic title"
 },
 "data" : {
     "body" : "Custom body",
     "title": "Custom title",
     "content" : "Your custom content"
 }